"in Broca's area there are only words" - huh?? I didn't get that claim.
But two minutes later:
"Broca's region is an 'action syntax' area" -- this seems like a pre-theoretical intuition, at best. Needs to be spelled out.
Unfortunately, no analysis was provided at the end. We saw a series of amusing studies, but no coherent argument. The conclusion was "generating and extracting action meanings" lies at the basis of Broca's area.
Now Greg: first point, he separates action semantics and speech perception. Evidently, he is taking the non-humor route ... He is however, arguing against the specific claim that mirror neuron arguments, as a special case of motor theories, are problematic at best.
Greg's next move ('The Irvine opening') is to examine the tasks used in the studies. The tasks are very complex and DO NOT capture naturalistic speech perception. For example, response selection in syllable discrimination tasks might be compromised while perception per se rmains intact.
His next - and presumably final - move ('The Hawaii gambit') is to show what data *should* look like to make the case. And he ends on a model. More or less ours. (Every word is true.)
At the risk of being overly glib, Luciano won the best-dressed award, and he won the Stephen Colbert special mention for nice science-humor. He had the better jokes. Greg, alas, won the argument. Because of ... I think ... a cognitive science motivated, analytic perspective. To make claims about the CAUSAL role of motor areas in speech, the burden is high to link to speech science, which is not well done in the mirror literature.